Manchester United will be told to forget about signing Borussia Dortmund defender Neven Subotic - even if they are prepared to sell back Shinji Kagawa - according to a source close to the Bundesliga club.
Speaking to the Daily Mail, the source revealed that Dortmund coach Jurgen Klopp is keen on the idea of taking Kagawa back to Signal Iduna Park, but he is not prepared to lose Subotic as part of a swap deal.
"Jurgen would love to have Kagawa back at the club and had made it clear the door is always open for him," the source told the Daily Mail.
"Shinji was quite emotional when he left and said he didn’t want to go but couldn’t turn down the chance of playing for United. Now it seems to have turned sour, he would be welcomed back with open arms.
"But United can forget about Subotic. When it was put to the powers that be, it was rejected out of hand. Klopp doesn’t want to lose him. He’s only 24, despite all his experience, and is an integral part of the team."
Kagawa has struggled to hold down a first-team place at Old Trafford since completing his £12m transfer from Dortmund in June 2012.
The Japan international flourished in the Bundesliga while playing in his favoured No. 10 role, but has often been forced out to the left wing during his short spell with Manchester United, who were crowned Premier League champions last season.
Klopp insisted in May that Kagawa is one of the best players in the world, adding that it makes his heart break to see his former player featuring in the final 20 minutes of matches on the left wing.